Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f7b2447b76af0b…

MALICIOUS

PDF

32.0 KB
MD5: 83a5159ee18b8ba876ddcb53679106c1 SHA-1: 6c49976f95e322af0e56d1f9a4781f13892c5cd4 SHA-256: 55f7b2447b76af0bf0e4f58699f2facce29f22bda4d6e5d5655be789eb250e0f
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains XFA (XML Forms Architecture) elements, which are known to be vulnerable to script-based attacks. Specifically, the 'PDF_XFA_SCRIPT' and 'PDF_XFA_NUMERIC_EVAL_STAGER' heuristics indicate the presence of executable script within the XFA form, likely used to download and execute a secondary payload. The ClamAV detection 'Js.Exploit.HTML-30' further confirms its malicious nature. The embedded URL is likely part of the exploit chain.

Heuristics 5

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • ClamAV: Js.Exploit.HTML-30 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Exploit.HTML-30
  • XFA numeric character-table eval stager high PDF_XFA_NUMERIC_EVAL_STAGER
    PDF XFA initialize script reads numeric form data from rawValue, maps the values through a short character table, and evals the reconstructed stage. This is an exploit-kit staging technique even when the final decoded layer remains encoded.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.xfa.org/schema/xfa-template/2.5/